Finding the Third Proportional to 100,903.50 and 221,488

Step by Step Solution

1. Step 1: Write the proportion equation
   100,903.50 : 221,488 = 221,488 : x
2. Step 2: Convert to fraction form
   100,903.50/221,488 = 221,488/x
3. Step 3: Cross multiply
   100,903.50x = 221,488 × 221,488
4. Step 4: Simplify right side
   100,903.50x = 49,056,934,144
5. Step 5: Solve for x
   x = 49,056,934,144/100,903.50
6. Step 6: Final answer
   x = 486,176.73